Machine for producing predetermined and uniform dimensioned wood shavings



\ June I, 1948 J. H. HASSLER El Al.

IACHINB FOR PRODUCING PREDETERMINED AND UNIFORM DIIENSIONED WOOD SHAVINGS Filed July 31, 1944 I 5 Sheets-$heet 1 IN V EN TORS e/O/M/ fl f/flSSt El? 7 town/w 0. 627625?! BY j v I ATTORNIEK June 9 8- J. H. HASSLER ET AL 2,442,492

MACHINE FOR PRODUCING PREDETERMINED AND UNIFORM DIMENSIONED'WOOD SHAVINGS 5 Sheets-Sheet 2 F1led.Ju1y 31, 1944 J 1, 8- J. H. HASSLER r-:r AL

MACHINE FOR PRODUCING PREDE'I'EHMINED AND UNIFORI DIHENSIONED WOOD SHAVINGS 5 Sheets-Sheet 3 Filed July 31, 1944 m g/ rans ma-0r gap/( M IONA IV. 1/03.! 150039190 6'. ,BY

June 1, 1948. J. H. HASSLER ET AL 2,442,492

MACHINE FOR PRODUCING PREDETERMINED AND UNIFORM DIMENSIONED WOOD SHAVINGS 5 Sheets-Sheet 4 Filed July 31, 1944 June 1, 1948.

J. H. HASSLER ET Al. 2,442,?92 MACHINE FOR PRODUCING PREDETERMINED AND UNIFORM'DIMENSIONED WOOD SHAVINGS Filed July 31. 1944 5 Sheets-Sheet 5 85 i ua/sw ff/ i g l a ZIF'O/V/IRD CZEWIE/FT 1 I 7 Z I ATTORNEY.

Patented June 1, 1948 MACHINE FOR PRODUCING PREDETER- MINED-AND UNIFORM DIMENSIONED WOOD SHAVINGS J ohnH. Hassler and Leonard CZ Englert, Wausau, Wis., assignors, by direct and means assignments, of one-half to said Hassle: and one-half to Albert W. Gerhard Application July 31, i944, Serial No. 547,342

Our invention relates ,to a machine for producing wood shavings, and has for its object, the production of a machine that will permit shave lugs to be out from wood, that is placed into an actuated hopper, the thickness and width of the shavings produced to be governed by adjustments made possible on the machine.

It is manifest to anyone familar with the art that the conventional machine for producing shavings, by means of a plurality of blades rotatably mounted, has a tendency to shave the wood into small particles of unequal thickness and size. However, there are definite uses to which shavings are put in which uniformity of the thickness, width and length of the shavings are desirable. The construction ofour machine will permit controlling the size of the product produced.

The many objects of our invention will become more apparent as the description of the device proceeds, especially when taken in conjunction with the various figures in the drawings, in which:

. Figure 1 is a side view of the entire assembly, illustrating the manner in which the hopper is actuated slidably over the revolving blades.

Figure 2 is a fragmentary side view of the rotary cutting blade assembly mounted on a shaft.

Figure 3 is an end view of the cutting blade assembly shown in Figure 2.

Figure 4 is a top view of the entire assembly.

Figur 5 is an end view of the machine, taken at the line at in Figure 1.

, .iustable pusher arms for actuating the hopper in a slidable manner.

Figure 11 is a fragmentary perspective view of the hopper, illustrating the manner in which the end plates are kept in frictional contact with the adjustable surface plates.

Figure 12 is'a fragmentary cross sectional view of Figure 11, taken at line l'2-l2.

Figure 13 is a top view of the conveyor driving mechanism. Figure 14 is an end view of the conveyer driv- 2 Claims. (CL 241-301) 2 ing mechanism, showing the conveyer belt in cross section, and

Figure 15 is a side view of Figure 14.

Similar characters of reference indicate corresponding parts throughout the several views, and referring now to the same, the character 20 shows a pair of I beams; acting as a base, supported by vertical structural members 2| acting as legs. A plurality of side brackets 22, disposed-upward from the I beams 20, support a. pair of slide rails 23, shown constructed of angle iron, and extending horizontally with the beams 20.

A rectangularly shaped hopper 24, supported by angle iron rests 25, slidably ngages the upper surface of the slide rails 23. This hopper 24 is provided with slidably mounted end boards 26, guided by a strap member 21, and urgeddownward by a pair of resilient members 28, in the form of springs, supported by small angle iron members 29, and which are fastened to the hopper 24 and support the springs 28 by means of the bolt 30.

There is a rotary blade assembly 3i, consisting of a shaft 32 and a block 33, said block having grooves 34 disposed longitudinally on the flat surface top as shown in Figure 3. There are blades 35 extending longitudinally the length of the block 33, and fastened by means of bolts 35, having the head 37 of the bolt engaging the slot 34, the bolt projecting outward through slots 38 in the blades 35, making it possible to adjust the blade 35 forward or backward onto the face 39 of the block 33. The blades 35, of which there are four shown in Figure 3, are ground to a cutting edge 40. It is understood, however, that there may be as many blades as desired, depending on the speed of the revolving unit and also the size of the shaving to be cut. These blades 35 may also be notched in staggered relation to one another if desired. The entire rotary blade assembly 3i is mounted on the shaft 32, which, in turn, is journalled in bearings 4i mounted to the upper face of the base beams 20.

Disposed at a point between the slide rails 23 above the base beams 20 are a pairfloi surface plates 42; These plates 42 are provided with removable edges 43 and beveled to conform with the cutting edges of the blades 35 on the blade assembly 3i. The plates 42 are supported by angularly disposed blocks 44, mounted onto slidable plates 45, resting onto the upper surface of the beams 20, and provided with slots 46 throu h which bolts 41 are placed. The angular y posed blocks 44, in turn, support grooved blocks 48 of the same angular relation as the blocks 44 aura-fee 3 and fastened to the bottom of the surface plates 42. In this manner, the plates 42 rest on and are supported by the beams 28 through contact with the grooved angularly disposed blocks 44 and 48.

There is an adjustment arrangement for raising and lowering the surface plates 42, consisting of angle irons supporting a threaded block 58 and an angle iron supporting a threaded block- .of the angle iron 48, while the threaded block 52 is supported by the upwardly extending flange of the angle iron 5|. Both the blocks 58 and 52 are engaged by a rotatively mounted screw 53,

which is shown rotated by means of a wheel 54 provided with a handle 55. In this manner, ro-

tating the wheel 54 revolves the screw 53, which eng es the threaded blocks 58 and 52 which are provided with right and left hand threads respectively. The screw 53, being similarlyprovided,

will draw the blocks 58 and 52 toward one another or away from one another, thereby sliding the angularly disposed'blocks 44 and 48, and raising the surface plates 42 or lowering the surface plates 42 and bringing the ends of the plates 42 closer toward or away from the rotating blade assembly 3|. This will determine the depth of the cut and will govern the thickness of the shaving.

Obviously, the endboards 28 on the hopper 24 will, at all times, contact the upper surface of the plates 42, due to the downward tension of the spring 28, the board 28 being guided by the bolts 58 sliding within the slots 51 in the board 28. The sliding action of the end boards 28, onto the 4 which may be an electric motor,'an internal combustion engineer any suitable means.

The hopper 24 has a pair of actuating brackets- 14 attached to one of its sides. These brackets 14 are connected to special links on the chain 83 by means of actuatinglink levers 18, which consist of separate sections overlapping one another and joined by means-of bolts through slots, and the levers are hingedly supported at 11 and 18 respectively on the brackets 14 and the special link members 15 of the chain 83.

In Figure 7, we show a modified arrangement of the inside of thehopper 2.4, i which a plurality of angles 18 are disposed vertically on the inner surface of the hopper 24, and these angles 18" support a plurality of removable partitions 88.

It is apparent thatthe number of angles18 and partitions 80 employed would be determined by the size of the shavings to be made. By emp1oy-' ing the partitions 88 within the hopper 24 to support wood particles shown as 8|, the width of the shavings may be governed if, for example, the wood pieces 8| have been previously sawed to a width of two inches and deposited within the space between the partitions in a manner so that the grain of the wood is in a horizontal plane, all

shavings cut by the blades will be of a two inch would be produced.

Immediately below the base beams 28, in direct alignment with the rotary blade assembly 3| and surface of the plates 42, will prevent the chips or wood from being forced outside of the hopper 24, and the angle of the hopper, at the point where the boards 25 are attached, will prevent the wood inside of the hopper from creeping upward at the ends of the hopper. This is a distinct advantage and assists very materially in permitting proper function of the device.

There are extending members 58 shown, sup-- ported by channel irons 58 on the upper face of the base beams 28. These members 58 act as a support for bearings 58 and 60' supporting shafts bearings 68 shown in Figure 8. These supports suspend a pair of bearings 68 into which a shaft 81 is iournalled.

(in the extreme outer ends of the shaft 6| are spur gears 88, and these spur gears 68 engage pinions 88 which are attached to the extreme outer ends of the shaft 81 journalled in the auxlliary bearings 58. There is also a pulley 18, shown mounted on the shaft 51. between the pinions 88 and the bearings 66. This pulley 18 isv caused to revolve by means of a belt 1| engaging a drive pulley 12 on the end of the shaft 32 which supports the blade assembly 3|. The shaft 32 has a drive pulley 13 attached to'the other end of it, and this pulley 13 is thereby connected to and is revolved by an actuating force (not shown) deposited parallel thereto, is an open trough 82 provided with cover plates 83 and 83' extended outward from the base beam 28 in both directions. The trough 82 is equipped with a conveyer belt 84 provided with aplurality of cleats 85. The belt 84 is actuated by means of pulleys 88 and 81 mounted on shafts 88 .Iournalled in bearings 88 on the lower face of the trough 82. One of the shafts 88 is provided with a pulley 88 actuated by a driven pulley 8| by means of a belt 82. The pulley 8| is mounted on a shaft 83 journalied in a bearing 84, which bearing is mounted on top of the cover plate 83. The other end of the shaft 83 is provided with a mitre gear 85 engaging another mitre gear 96, mounted on the end of another shaft 91 which is disposed at right angles to the shaft 83. The shaft 81 is journalled in a bearing 88, which is also mounted on top of the cover plate 83. The shaft 81 has a pulley I80 mounted thereon and actuated by means of a belt H from a pulley I82, fastened to the shaft 32 at a point between the pulley 12 and the bearing 4|.

In operation the device functions as follows:

A source of motive power (not shown) is attached by any suitable means to apulley 13, or if a chain drive is employed, the pulley 13 may be replaced with a sprocket, and if the unit is to be gear driven, by a gear. The revolving of the pulley 13 turns the shaft 32 on which theblade assembly 3| is mounted. The wood slabs 8|, or their 'These link levers are moved by the chain 83, thereby causing the hopper 24 to slidably move over the surface plates 42 along the slide rails 23. The plates 42, being spaced from one another and extending away from the blade assembly 31, permit contact of the blades 38 with the wood in the hopper 24, which is fed downward to the blades 35 by gravity.

By turning the screws 53 and by contact of the blocks 44 and 48, the plates 42 are moved upward or downward and, at the same time, spreadapart from one another or brought closer together toward and away from the revolving blades 35 on the blade assembly 3| In this manner, the thickness and length of the shavings being cut is controlled, and the distance between the cutting edges 40 of the-various blades 35 together with the speed of travel of the hopper, as actuated by the chains 92,- will determine the cutting efliciency of the blades. for obviously, there must be a different rate of synchronization when cutting hard wood or soft wood.

-It is also obvious that the frictional contact of the bottom of the end boards 26 with the top surface of the surface plates 42 will prevent the wood from creeping below the hopper, and the degree of angle of the hopper and plates are set where the end boards 28 are attached will keep V the wood in the hopper 24 from raising upward when the blades cut at the end of the stroke.

The conveyer belt 34, receiving the shavings through the open trough 92, will cause the shavlugs to be brought outward away from the machine, where they may be deposited into a car or the like by means of a blower or any other conventional manner.

The entire unit permits adjustment of the height of the surface plates in their relation with the revolving blades. The angularly disposed blocks 44 and 48 may be moved and adjusted by the plates 45, the bearings 99' are adjustable on the plates 64 for keeping the proper tension on the chain 83 and the travel of the hopper 24 may be regulated by the link levers I6.

Having thus described our invention what we claim and desire to secure by Letters Patent is:

l. A device of the character described comprising a horizontal base. legs vertically disposed for supporting said base, a pair of horizontal slide rails extending longitudinally with and supported by said base. a blade assembly consisting of a plurality of blades mounted on a shaft journalled in bearings supported by said base. said blade assembly disposed in angular relation to the slide rails, a hopper slidably mounted on said slide rails and extending downward between said rails, a pair of surface plates mounted in an adjustable manner to said base between said rails, said surface plates extending in opposite directions from said blade assembly, means for raising and lowering said surface plates on angularly disposed blocks supported by said base thereby causing said surface plates to approach said blade as sembly when being raised, and retrieved from said blade assembly when being lowered in relation to the periphery of the revolving blades, adjustabie end boards mounted on the outer face of said hopper in parallel relation to said blade assembly, said end boards urged downward for frictional contact with the face of said surface plates, two pair of sprockets mounted on shafts journalled in bearings supported by said base, each pair of sprockets connected by an endless chain, a pair of actuating links hingedly supported by said chain on oneend and said hopper on the other end, .said links constructed of two members adjacent to one another ,and provided with elongated slots at their point of contact to permit longitudinal adjustment, means forrotating said sprockets from the blade assembly, thereby causing slidable'actuation of said hopper on said surface plate. a conveyer belt mounted below said blade assembly inparallel relation to said blade assembly, said conveyer belt actuated by means from said rotating blade assembly, thereby causing the particles cut by the blades to be carried outward and away from the machine.

2. A device as described in claim 1, in which the ends of said hopper supporting the end boards providing frictional contact with the surface plates are angularly disposed and extending outward at their lower end to prevent the material in said hopper from being forced upward when the blades contact the material at the end of the forward and backward stroke.

JOHN H. HASSIER. LEONARD C. ENGIERT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 31,779 Burdett Mar. 26, 1861 87,139 Burghardt Feb. 23, 1869 435,359 Jull Aug. 26, 1890 937,240 Haldeman Oct. 19, 1909 1,478,193 Ward Dec. 18, 1923 1,515,377 White Nov. 11, 1924 1,974,647 Hagmaier Sept. 25, 1934 1,999,607 Haemaier Apr. 80, 1935 

